Bullying is unnecessary and it just happens due to everyone being afraid of being punched in the face. Bullies are not special exemplary specimens of humans, they are just people with zero impulse control and very strong sociopathic tendencies. Research has been made on this subject and when bullies were moved to different schools where they themselves became the weak kids, then they started to be bullied, themselves. Worst of all, female teachers are often afraid of the bullies themselves as well, so they will often silently let the bullies bully the kids uninterrupted by authority. Or they will silently side with the bullies and allow it to happen, due to the students havinf deserved it, for being "shit" or "stupid". They see it as the students just reward for being poor at math or whatever else they are bad at. It's despicable behavior all around, really.